Fossil fuels
Starter
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BURNING
CAPROCK
CHEMICAL
COAL
ENERGY
FIRE
FOSSILS
FUEL
HEAT
HEAT
LIGHT
OIL
PETROL
REMAINS
SMOKE
| E | E | R | I | F | U | E | L | T |
| G | N | S | M | O | K | E | L | T |
| N | E | N | F | S | U | A | H | H |
| I | R | I | L | S | C | G | P | H |
| N | G | A | Z | I | I | H | E | B |
| R | Y | M | M | L | L | E | T | U |
| U | M | E | H | S | A | A | R | K |
| B | H | R | L | I | O | T | O | Z |
| C | A | P | R | O | C | K | L | T |
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